🐛 [Bug] Issue in `broadcastable` converter utility

[gs-olive]

Bug Description

Encountered IndexError in broadcastable utility:

File "~/TensorRT/py/torch_tensorrt/dynamo/conversion/converter_utils.py", line 118, in broadcastable
     greater_tensor[i] != lesser_tensor[j]

IndexError: tuple index out of range

While executing %where_5 : [num_users=1] = call_function[target=torch.ops.aten.where.self](...)

To Reproduce

Steps to reproduce the behavior:

Invoke aten.where converter with a 0D tensor.

Expected behavior

Utility should not error.

Environment

• Torch-TensorRT Version (e.g. 1.0.0): 8c62fca
• PyTorch Version (e.g. 1.0): 2.1.0.dev20230803+cu121

Additional context

Blocking compilation of #1697 with torch compile path.